Author Topic: new build LCD lit but blank - (Solved)  (Read 48 times)

ghostofjohntoad

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new build LCD lit but blank - (Solved)
« on: November 24, 2017, 11:40:45 PM »
Just finished building the PreenFM2 and it fired up 1st time.  I used an LCD instead of OLED. The LCD is lit, but blank.  I went back and checked all connections and then also put a 10k trimmer in for RV1 since I have the LCD(thought that could be the problem).  I checked the jumpers, I have jumpers on 1 and 2 but not 3.  I am using a compatible HD44780 LCD.  I am using USB power only.  The unit is making sounds and I can change them but I am doing so blind.  Any thoughts what else I can try?
« Last Edit: November 25, 2017, 01:19:29 AM by ghostofjohntoad »

ghostofjohntoad

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Re: new build LCD lit but blank
« Reply #1 on: November 25, 2017, 01:18:20 AM »
OK I solved it.  Didn't realize I needed a connection in the OLED resistor spot.  Put a wire there it it works great.  Awesome sounding!